Social Media Career

I've not done that career yet. Have you checked Carl's Guide?

https://www.carls-sims-4-guide.com/careers/cityliving/socialmedia/

Does anyone know if there is way to get followers easily without the social media career?

Those videos if edited pay very roughly the same amount in royalties per day as book royalties (from a publisher). S100-200 from what I've seen, and our sims are not super high skilled in media production. The money for each video decreases gradually over time too as the book royalties do. As with the books, you can have many videos providing royalties at once, they just decrease in the money they earn.